Valve



Patented June 24, 1930 UNITED STATES PATENT TO E EDWIN IB. SADTLER, or NEW YORK, n. Y.,, AssIeNon TO rnasonyunneinnnnme CORPORATION, or NEW YORK, N. Y., A CORPORATION or ew Yonx VALVE Application filed December 6, 1927. Serial No. 238,112;

My invention relates to a valve, and more particularly to means for securing a valve to its seat when closed, and will be understood by reference to the following description taken in connection with the accompanying drawings in which, Fig. 1 is a vertical section of a part of a pipe line in which my valve is used; Fig. 2 is an elevation looking toward the right of Fig. 1; Fig. 3 is a transverse section on the plane of theline 33, of Fig. 1; Fig. 4 is an enlarged sectional detail on the plane of the line 4.4, Fig. 3; Fig. 5 is a view of a modification partly in section and partlyin elevation of the means for holding the valve to its seat; and Fig. 6 is a section on the plane of the line 6-6 of Fig. 5. Similar reference numerals indicate similar parts in the several views. I

In systems for burning pulverized. coal, the fuel is ground so that a relatively large percentage of it will pass through a 200 mesh screen. Such fuel is distributed by a blast of so-called carrier air through a system of piping to burners. The pipes are equipped with valves but one difficulty has been to secure an effective closing of the valves because of the accumulation of the fuel on the seats. The object of my invention is to overcome this difliculty and by which the valves may be properly seated and held in position when closed.

Referring to the Figs. 1 to 4, the numeral 1 indicates a casing having flanges by which it may be secured by bolts through openings 2 between two pipe sections 3 and 4:- The casing 1, in transverse section, is preferably of the form shown in Fig. 3, that is, with a straight side 5 and straight sections 6 merging into a curved or semi-circular wall.

. The valve 7 is supported upon a pintle 8 carried in a bearing 9 extending along the lower side of the casing 5. The pintle has secured thereto a handle 10 by which the valve may be moved toward or away from its seat. A lock nut 11 mounted on the end of the pintle is adapted to bear against the side of the handle to hold it and the valve from accidental movement.

The valve seat 12 is annular in form and is secured betwen the flange of pipe section 3 V and an undercut section of: flange 13 of easing 1, as indicated in the drawings. The face 12 of this seat is preferably a section of the surface of a hollow sphere, that is, on the arc of a circle in transverse section. The under side 7 of valve 7 is correspondingly shaped. Such inclined or cam like faces insure a close contact between the valve and its seat notwithstanding the wear or the parts or any slight distortion of either part.v I

Passing through openings in the lower flange 13 of the casing l are screws 14: adapted to engage the valve 7 when the latter is seated. The engagement may be provided.

for in any suitable way, but I prefer that shown in which the innerends of the screws are formed with a cone surface 15 and the engaged portion of the valve with acorresponding] beveled surface 7 The provision of cam surfaces on the screws and the valve. compensates for any wear of either part. The screws are moved inwardly to engage the valve when the latter is seated, or outwardly to release the valve, by turning the handles 16. I have shown two oppo sitely disposed screws 14: and that number will, in practice, be suflicient for the purpose. r

In Figs. 5 and 6 I have shown a modi fication in which that part of the-flange 17 through which the bearing screws pass, is

formed with recesses 18, and the screws 19.

formed on their sides with a plurality of pockets 20 preferably tapering from the conical, bearing head 19. The purpose of these features is to obviate any liability of the pulverized coal choking the bearings for the screws and preventing them from functioning properly. The recesses 18 become filled with pulverized coal and should any of this work its .way between the screws and their bearings in flange 17 such portions will fall into the pockets 20 when the screws are moved inwardly to lock the valve and will be carried forward into the masses in recesses 18. The form of the valve and its seat is the same in Fig.5 as in Fig. 4.

By providing a seat with a cam face and a valve holding means with a similar face co-operating with the valve on its upper side, any accumulation of finely divided fuel on the valve or its seat will not prevent the proper seating of the valve.

What I claim is:

1. A valve unit for pulverized coal conduits comprising a casing having a valve mounted therein and a seat for the valve, said casing having openings therein, means frnovably supported in} said openings for locking the valve in closed position, said locking means being formed with pockets for the purpose described.

2. A valve unit for pulverized coal conduits comprising a casing having a valve mounted therein and a seat for the valve, said casing having threaded openings therein and recessed sections, screws supported in said openings and projecting at their inner ends into said recesses, said screws having pockets formed on their sides for the purpose described.

Signed at New York city in the county of New York and State of New York, this 2nd day of December, A. D. 1927.

EDWIN B. SADTLER. 

